It is a planned language which belongs to no one country or group of states. Take a look at http://www.esperanto.net

Esperanto works! I’ve used it in speech and writing in a dozen countries over recent years.
Indeed, the language has some remarkable practical benefits. Personally, I’ve made friends around the world through Esperanto that I would never have been able to communicate with otherwise. And then there’s the Pasporta Servo , which provides free lodging and local information to Esperanto-speaking travellers in over 90 countries. In the past year I have had guided tours of Berlin and Milan in the planned language. I have discussed philosophy with a Slovene poet, humour on television with a Bulgarian TV producer. I’ve discussed what life was like in East Berlin before the wall came down, how to cook perfect spaghetti, the advantages and disadvantages of monarchy, and so on. I recommend it, not just as an ideal but as a very practical way to overcome language barriers. Take a look at http://www.esperanto.net